Magnetic Pickup (Mpu) Assembly - Printronix P5000 Maintenance Manual

Chapter 5
Section I: Replacement Procedures

Magnetic Pickup (MPU) Assembly

Removal
1. Prepare the printer for maintenance (page 132).
2. Remove the shuttle cover (page 178).
3. Disconnect the magnetic pickup (MPU) cable connector (page 238, item
5).
4. Loosen the 7/64 inch hex MPU clamp screw (page 238, item 3).
5. Unscrew the MPU assembly from the MPU bracket.
Installation
1. Install the MPU assembly by screwing it into the MPU bracket. (See
Figure 40, page 238).
2. Using a feeler gauge, adjust the gap between the MPU assembly and the
flywheel to 0.010 ± .001 inch (0.254 ± 0.025 mm). Torque the 7/16 inch
MPU clamp screw to 18 ± 1 inch-pounds (2.03 ± 0.11 N•m).
3. Check the gap between the MPU assembly and the flywheel with a feeler
gauge:
a. If the gap is 0.010 ± .001 inch (0.254 ± 0.025 mm), go to step 4.
b. If the gap is not 0.010 ± 0.001 inch (0.254 ± 0.025 mm), loosen the
4. Route the MPU cable under the extension spring and connect the MPU
cable connector (page 238, item 5). Make sure the MPU cable does not
touch the extension spring after cable connection.
5. Install the shuttle cover (page 178).
6. Adjust the hammer phasing (page 148).
7. Return the printer to normal operation (page 133).
188
MPU clamp screw and go back to step 2.